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14.4.22 A Question Help 0 Consider the set of ordered pairs shown below. Assuming that the regression equation is y = 5.413-0

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Answer #1

Sxx =Σ (Xi - X̅ )2 =    9.2
Syy = Σ( Yi - Y̅ )2 =    11.2
Sxy = Σ (Xi - X̅ ) * (Yi - Y̅) =    8.36

X̅ = Σ( Xi / n ) = 17/5 = 3.4
Y̅ = Σ( Yi / n ) = 23/5 = 4.6

Standard Error of Estimate S = √ ( Σ (Y - Ŷ ) / n - 2) = √(10.6739 / 3) = 1.886

Confidence Interval of    \mu_{Y|X = 2}
Ŷ = 5.413 + -0.2391 X
Ŷ = 4.935
se[160] ta/2 (.30 – 7)? + -] x 92 n Sri
t(α/2) = t(0.05/2) =3.182

95% confidence interval is ( 1.077 < \mu_{Y|X = 2} < 8.793 )


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